Order Of Adjustments

[Martin N.]

My 74 L-48 with A/C just got fresh plugs, points, condensor, etc. and am looking to go through the misc. adjustments now. I normally adjust the dwell 1st. the timing 2nd. and carb 3rd. then go back and double check these, correct? I use the GM service manual and the emissions tag for all of the spec's. These adjustments are done with a vacuum gauge, dwell / tach meter and of course a timing light. Just wondering, thanks.

Marty

[Duke W.]

Re: Order Of Adjustments

Correct. Since changing dwell changes timing, set the dwell first, then timing, and the ignition system adjustements should be correct before you tweak the carburetor.

Duke

[Martin N.]

Re: Order Of Adjustments

Correct. Since changing dwell changes timing, set the dwell first, then timing, and the ignition system adjustements should be correct before you tweak the carburetor.

Duke

DUKE-
Thanks for the response. Another question while I got you. When balancing out the carb I usually use the vac. gauge as the main adjusting instrument as opposed to the tach. I balance the 2 sides going from side to side by bringing the vacuum to it's highest point (which right now appears to be @ 18" in Park). But, should this carb balancing be done with the car in DRIVE or in PARK? I set idle speed in Drive.

Marty

[Duke W.]

Re: Order Of Adjustments

I assume you are talking about the idle mixture screws. Yes, I would set the idle speed/mixture adjustment in Drive.

Duke